Nellis Air Force Base, a part of the United States Air Force's Air Combat Command, is located approximately eight miles northeast of Las Vegas, Nevava. The base itself covers more than 14,000 acres, while the total land area occupied by Nellis and its restricted ranges is about 5,000 square miles. An additional 7,700 miles of airspace north and east of the restricted ranges are also available for military flight operations. Nellis is a major focal point for advanced combat aviation training. Its mission is accomplished through an array of aircraft, including fighters, bombers, refuelers, and aircraft used for transport, close-air-support, command-and-control and combat search-and-rescue. The Nellis work force of about 14,914 military, civilians and contractors makes it one of the largest single employers in Southern Nevada. The total military population numbers more than 46,000, including family members and military retirees in the area.